# Mailspring vs Mimestream

| Attribute | Mailspring | Mimestream |
|---|---|---|
| **Vioscale score** | 66.3 (29% (low)) | 63.2 (26% (low)) |
| activity.commits_last_30d | 38 | - |
| adoption.github_stars | 17,762 | - |
| deployment.options | - | `{"cloud":true}` |
| description.long | A lightweight desktop application for Mac, Windows, and Linux that brings together multiple email accounts from different providers into one unified inbox. Core features run locally on your computer, with optional paid features for message tracking, scheduling, and productivity analytics. | A desktop email application designed for macOS that establishes direct connections to Gmail through its API, combining operating system capabilities with Gmail's functionality. It prioritizes privacy by storing all data and authentication tokens locally on your device rather than routing through intermediary services. |
| features.capabilities | `{"pricing_model":"freemium","deployment_model":"local_direct_imap_client","read_receipts_and_open_tracking":true,"snooze_and_scheduled_send_later":true,"unified_multi_account_inbox_view":true,"universal_imap_smtp_exchange_support":true}` | - |
| integrations.count | 7 | 3 |
| integrations.list | `[{"name":"Gmail"},{"name":"iCloud"},{"name":"Office 365"},{"name":"FastMail"},{"name":"Outlook.com"},{"name":"Yahoo!"},{"name":"IMAP"},{"name":"SMTP"}]` | `[{"name":"Gmail API"},{"name":"Google Calendar"},{"name":"Apple Calendar"}]` |
| language.primary | JavaScript | - |
| license.spdx | GPL-3.0 | - |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"mac":true,"linux":true,"windows":true}` | `{"mac":true}` |
| pricing | `{"type":"freemium","plans":[{"free":true,"name":"Free","features":["Multi-account support","Unified inbox","Snooze","Send later","Mail rules","Templates","Grammar and spell checking","Translation support","Follow-up reminders"],"description":"Multi-account email client with unified inbox, local sync, and productivity features","contactSales":false},{"free":false,"name":"Pro","summary":"$8/month","features":["Read receipts","Link tracking","Unlimited snooze and send later","Mailbox analytics","Contact and company profiles"],"components":[{"kind":"fixed","amount":8,"period":"month","currency":"USD"}],"description":"Adds message tracking and unlimited scheduling features","contactSales":false}],"summary":"Free tier available; Pro at $8/month","currency":"USD","freeTier":true,"sourceUrl":"https://getmailspring.com","retrievedAt":"2026-08-21T12:46:43.649Z","startingPrice":{"amount":8,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | `{"type":"subscription","plans":[{"free":false,"name":"Individual","summary":"$4.99/month or $49.99/year with family sharing","features":["Gmail label management with color coding","Server-side filter management","Quick calendar invitation responses","Full Gmail search functionality","Vacation responder configuration","Multiple Gmail account support","Per-account color assignment","Inline mention functionality","macOS UI integration","Family sharing across up to 5 devices"],"components":[{"kind":"fixed","amount":49.99,"period":"year","currency":"USD"},{"kind":"fixed","amount":4.99,"period":"month","currency":"USD"}],"description":"For individual users with family sharing support","contactSales":false},{"free":false,"name":"Team","summary":"Contact sales for custom pricing","features":["All Individual plan features","Centralized billing administration","Team seat management tools"],"minSeats":51,"description":"For organizations with more than 50 seats","contactSales":true}],"summary":"From $4.99/month or $49.99/year. 14-day free trial without credit card.","currency":"USD","freeTier":false,"sourceUrl":"https://mimestream.com/pricing","retrievedAt":"2026-08-20T12:47:29.793Z","freeTrialDays":14,"startingPrice":{"amount":4.99,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` |
| pricing.free_tier | yes | no |
| pricing.model | commercial | commercial |
| pricing.price_level | low | low |
| pricing.starting_price | `{"amount":8,"currency":"USD"}` | `{"amount":4.99,"currency":"USD"}` |
| pricing.transparent | yes | yes |
| release.cadence_days | 15 | - |
| release.history | `[{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.23.0","date":"2026-07-22T03:45:22Z","type":"stable","version":"1.23.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.22.0","date":"2026-06-13T20:30:13Z","type":"stable","version":"1.22.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.21.1","date":"2026-05-20T20:31:26Z","type":"stable","version":"1.21.1"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.21.0","date":"2026-05-06T13:40:43Z","type":"stable","version":"1.21.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.20.1","date":"2026-04-20T16:07:46Z","type":"stable","version":"1.20.1"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.20.0","date":"2026-04-19T03:40:03Z","type":"stable","version":"1.20.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.19.1","date":"2026-04-07T01:34:03Z","type":"stable","version":"1.19.1"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.19.0","date":"2026-03-10T04:46:53Z","type":"stable","version":"1.19.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.18.0","date":"2026-02-23T14:40:58Z","type":"stable","version":"1.18.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.17.4","date":"2026-02-11T16:59:03Z","type":"stable","version":"1.17.4"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.17.3","date":"2026-01-31T20:21:11Z","type":"stable","version":"1.17.3"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.17.2","date":"2026-01-24T21:09:28Z","type":"stable","version":"1.17.2"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.17.1","date":"2026-01-15T20:55:25Z","type":"stable","version":"1.17.1"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.17.0","date":"2026-01-14T22:33:16Z","type":"stable","version":"1.17.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.16.0","date":"2025-07-16T14:29:44Z","type":"stable","version":"1.16.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.15.1","date":"2025-01-27T00:52:05Z","type":"stable","version":"1.15.1"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.15.0","date":"2025-01-02T15:25:00Z","type":"stable","version":"1.15.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.14.0","date":"2024-09-15T00:35:52Z","type":"stable","version":"1.14.0"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.13.3","date":"2024-01-08T19:59:00Z","type":"stable","version":"1.13.3"},{"url":"https://github.com/Foundry376/Mailspring/releases/tag/1.13.2","date":"2023-12-11T02:31:01Z","type":"stable","version":"1.13.2"}]` | - |

## Capabilities (Email Clients)

| Capability | Mailspring | Mimestream |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Deployment model | Local direct imap client | - |
| Universal imap smtp exchange support | ✓ | - |
| Keyboard shortcut only navigation speed | - | - |
| Split inbox AI auto categorization | - | - |
| Read receipts and open tracking | ✓ | - |
| Snooze and scheduled send later | ✓ | - |
| Generative AI LLM email drafting | - | - |
| Conversational chat layout view | - | - |
| Unified multi account inbox view | ✓ | - |
| Pgp end to end encryption support | - | - |
| SOC2 type ii | - | - |
| ISO 27001 | - | - |
| Pricing model | Freemium | - |

*Source: Vioscale. Generated 2026-09-01T15:02:00.993Z. "-" = undocumented, not absent.*